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US-2022316847-A1 · Oct 6, 2022 · US
Obturator for 105MM projectile
US9689649B1 · US · B1
| Field | Value |
|---|---|
| Publication number | US-9689649-B1 |
| Application number | US-201414464141-A |
| Country | US |
| Kind code | B1 |
| Filing date | Aug 20, 2014 |
| Priority date | Aug 20, 2014 |
| Publication date | Jun 27, 2017 |
| Grant date | Jun 27, 2017 |
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Abstract
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A high efficiency, blow-by reducing obturator for a 105 mm tube-launched projectile is a generally annular ring having a central longitudinal axis and an outer circumferential surface. The outer surface has a first portion parallel to the central longitudinal axis and a second portion adjacent to the first portion. The second portion extends forward and radially inward at an angle of about six degrees with the central longitudinal axis. In some embodiments, one or more grooves are formed in the inner circumferential surface of the ring.
First claim
Opening claim text (preview).
What is claimed is: 1. An obturator for a 105 mm tube-launched projectile having a central longitudinal axis and a circumferential obturator slot, the obturator comprising: a generally annular ring having a central longitudinal axis an outer circumferential surface including a first portion beginning at an aft face of the ring and extending forward parallel to the central longitudinal axis, a second portion adjacent to the first portion and extending forward and radially inward at an angle of six degrees with the central longitudinal axis; and an inner circumferential surface including a single, continuous helical groove formed therein, the groove extending around the inner circumferential surface of the ring and having a semi-circular shape, a depth equal to one half its width, and a pitch in a range of 0.15 to 0.25 inches distance from one crest to the next crest. 2. The obturator of claim 1 , wherein an axial length of the ring is less than one inch and an axial length of the first portion of the outer circumferential surface is seventy-seven percent of the axial length of the ring.
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- What does patent US9689649B1 cover?
- A high efficiency, blow-by reducing obturator for a 105 mm tube-launched projectile is a generally annular ring having a central longitudinal axis and an outer circumferential surface. The outer surface has a first portion parallel to the central longitudinal axis and a second portion adjacent to the first portion. The second portion extends forward and radially inward at an angle of about six …
- Who is the assignee on this patent?
- Hooke Ryan, Stout Christopher, Us Army
- What technology area does this patent fall under?
- Primary CPC classification F42B14/06. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jun 27 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).